Seachem Reef Advantage Magnesium 1.2kg

Restore and Maintain Optimal Magnesium Levels in Reef Aquariums

Maintaining proper magnesium levels is essential for reef aquariums to ensure stable pH, healthy coral growth, and optimal ionic balance. Seachem Reef Advantage Magnesium™ is a concentrated (80,000 ppm) blend of magnesium, chloride, and sulfate salts designed to restore depleted magnesium levels efficiently while minimizing impact on natural sea water ionic ratios.

This high-quality formulation contains no ammonia, unlike many other liquid magnesium supplements, and is ideal for use with kalkwasser, carbonate additives, or low-magnesium salt mixes.

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Key Features

• Restores magnesium levels with minimal effect on ionic balance
• Concentrated 80,000 ppm formula
• Free of ammonia contaminants
• Easy to dose for beginner, advanced, and expert aquarists
• Supports coral health and pH stability

Directions

• Beginner: Dissolve 5g (1 level teaspoon) per 80L (20 gallons) twice a week in 250ml freshwater.

• Advanced: Adjust magnesium to 1,200–1,350mg/L. Each 5g/80L raises magnesium by ~5mg/L. Do not exceed 25g/80L per day.

• Expert: Use a continuous drip system based on magnesium depletion rate. Formula: g = v * m / 80 (g=grams to add, v=liters, m=mg/L to raise).

• Do not mix directly with carbonate additives; add magnesium and carbonate on alternate days or 30+ minutes apart.

Ingredients

• Magnesium sulfate
• Sodium chloride

Guaranteed Analysis

• Magnesium (Mg) (min): 80 mg per 1g